You are purchasing jeans & shirts. jeans cost $35 and shirts cost $15. you want to buy 5 items & have $115 to spend. write a system of linear equations to model your situation.

Call j the amount of jeans you buy and s the amount of shirts.

j+s=5
35j+15s=116

Period is the time it takes for one “cycle” to complete. in the parent sine function, period is 2*pi since sin(0) = 0, sin(pi/2) = 1, sin(pi) = 0, sin(3pi/2) = -1, and sin(2pi) = 0. at that point, the sequence repeats itself. i’m not sure if your graph is similar to the sine function since you didn’t provide a picture, but you can find the period by looking at a graph.